Lonsdale Bommies

Bommie DiveBommie Dive | Boat access

Crayfish Dive Site Open Water Rated Outside Port Phillip Reef Dive Site

Depth: 12 metres (39 feet) to 18 metres (59 feet)

Approximately one kilometre from the Point Lonsdale Light and clear of the shipping channel, just outside Port Phillip Heads in Bass Strait is an amazing area of bommies or underwater rock formations. The strong current flow in this area has created a nutrient-rich environment and subsequently prolific marine growth and the associated marine life. But it is the amazing rock formations that make this dive site special. A favourite spot for catching crays.

Diving Lonsdale Bommies on Redboats | © Colin Grant

Crayfish Dive Site
Crayfish Dive Site | © Ian Scholey

Divers have the opportunity to catch Southern Rock Lobster (aka Crayfish) at this dive site. Remember your catch bag, current Victorian Recreational Fishing Licence, rock lobster measure, and cray tags. Once you get back to the dive boat, or shore, make sure you clip the tail and tag your Crayfish as per Fisheries requirements. Please abide by all current fishing regulations if you intend to catch crays. See How To Catch Crayfish for practical cray hunting advice from The Scuba Doctor, plus Melbourne Cray Dives for a list of other crayfish dive sites near Melbourne. For tips on cooking your Crays, please see How To Cook Crayfish.

Finding the Lonsdale Bommies

Over the years we've been provided with different GPS marks for the Lonsdale Bommies. The GPS marks we know of in circulation for the Lonsdale Bommies are:

  • Peter Fear GPS (verified)
    Latitude: 38° 17.983′ S   (38.299717° S / 38° 17′ 58.98″ S)
    Longitude: 144° 36.730′ E   (144.612167° E / 144° 36′ 43.8″ E)
  • Geoff Rodda:
    Latitude: 38° 16.937′ S   (38.2822833333° S / 38° 16′ 56.22″ S)
    Longitude: 144° 38.792′ E   (144.646533333° E / 144° 38′ 47.52″ E)

    3,571 m, bearing 57°, ENE


Lonsdale Bommies Location Map

Latitude: 38° 17.983′ S   (38.299717° S / 38° 17′ 58.98″ S)
Longitude: 144° 36.730′ E   (144.612167° E / 144° 36′ 43.8″ E)

Datum: WGS84 | Google Map
Added: 2012-07-22 01:00:00 GMT, Last updated: 2021-04-01 10:34:25 GMT
Source: Peter Fear GPS (verified)
Nearest Neighbour: Twin Bommies, 142 m, bearing 283°, WNW
Depth: 12 to 18 m.
Dive only on: Ebb.

DISCLAIMER: No claim is made by The Scuba Doctor as to the accuracy of the dive site coordinates listed here. Should anyone decide to use these GPS marks to locate and dive on a site, they do so entirely at their own risk. Always verify against other sources.

The marks come from numerous sources including commercial operators, independent dive clubs, reference works, and active divers. Some are known to be accurate, while others may not be. Some GPS marks may even have come from maps using the AGD66 datum, and thus may need be converted to the WGS84 datum. To distinguish between the possible accuracy of the dive site marks, we've tried to give each mark a source of GPS, Google Earth, or unknown.

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